Low cost commercially available robotic arm

Where can one find "low cost" 5-6 degree f freedom robotic arm capable of accessing an area of around 60cm radius with positioning accuracy of
0.5-1.0mm and capable of carrying/holding 500gm load ?
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Miem wrote:

Occasionally something will show up on Ebay. The Rhino educational robot meets the workspace spec; but it probably can't handle the load and it definitely is not accurate enough.
How does one define "low cost"? The first google hit for "SCARA" returns a system which meets most of your specs for $12,000.
- Daniel
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